Thread-parting mechanism for looms.



PATENTED JUNE 30, 1903.

3- THREAD PARTI QM M 0 0 L R. mm 1 m wNn P MHD 1 H TE... SMM S Gm m 0 I L P P A N0 MODEL.

UNITED STATES I Pateiited'd'une 30, 1903.

PATENT OFFICE.

EDWARD s. STIMPSON, OF HoPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, or HOP'EDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

THREAD-PA R TING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 732,460, dated June 30, 1903.

Application filed April 24, 1903- T0 at wlwm it may concern:

Beit known that I, EDWARD S. STIMPSON, a citizen of the United States, and aresident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Thread-Parting Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to automatic looms wherein the old thread of filling is parted at points adjacent the shuttle and the edge of the cloth at the time of filling replenishment, the piece of thread so out being temporarily retained by a thread-holder until there is no further danger of its being woven into the cloth. An apparatus of such general character is shown and described in United States Patent No. 718,955, granted to me January 20, 1903, the thread-parting and thread-holding means being mounted on a swinging support which serves as a shuttl'e-feeler. In said patent a yielding plunger is employed as a stop to retain the swinging support in normal position and also to permit sufficient retrograde movement thereof-should it accidentally engage the shuttle at a time when filling replenishment is not to be effected. The return movement of the support or shuttle feeler to normal position is rapid, and it has been found that there is at times a tendency to rebound after striking the yielding plunger, the force of the blow also tending to shake the piece of cut thread fromthe threadholder prematurely.

My present invention has for its object the production of means for preventing rebound of the swinging support or shuttle-feeler, whereby the objectionable features referred to are obviated.

The novel features of my invention will be described in the subjoined specification, and particularly pointed out in the following claims. 1

Figure 1 is a transverse sectional view of an automatic filling-replenishing loom embodying my invention and shown in normal position. 2 is a detail side elevation of Serial Ito-154,139. n model.)

the means for retarding and-stopping the to normal position, the supporting-bracket being seen from the side opposite that shown the parts shown'in Fig. 2.

The bracket A the swinging arm or support Y, fulcrumed thereon at a and extended rearwardly at its upper end at Y to form a shuttle-feeler, the rock-shaft d, forming a member of the controlling means for the filling-replenishing mechanism, and the arm 01 and jaw d1 cooperating conjointly with the pin 30 on the arm Y, and thereby operatively connecting the latter with the rock-shaft d,

Upon the swinging support Y a threadparter and a thread-holderaremounted, substantially as in mypatent referred to, the .movable memberor jaw h being the only member of the thread-parter clearly shown in Fig. 1, and the presser p and cooperating fixed jaw h are members of the thread-holder. The movable blade of the thread-parter and the presser p are both mounted on the movable member h and the operation of the thread-parter and thread-holder may be substantially as in said patent and form no part of my present invention.

The arm A which forms a part of the bracket A and which in my prior patent sustained the yielding plunger or stop for the swinging support Y, is herein shown as having a lateral shelf (17 in front of the said support Y; but beyond its range of movement and on said shelf I have mounted a combined yielding stop and retarding device or detent for the swinging support. p

As best shown in Figs 2 and 3, a stout piece of spring-Wire is bent between its ends to form an eye w the ends being then extended rearwardly and the shorter end 10' is bent laterally at w across the path of movement of the support Y. The longer end 'w of the wire is extended beyond the bend to and slightly outturned at its extremity. A screw 95 is passed between the ends w and 10 and screwed into the shelf a, the head 96 of the screw and a Washer 97 overlapping said ends movement of the shuttle-feeler as it returns.

may be and are all as in my patent referred to.

in Fig. 1; and Fig. 3 is a front elevation of p and holding them securely upon the shelf, the eye fitting over an upturned lug a on the shelf. The long arm 10 constitutes a friction-detent, it being so arranged that its normal tendency is to partly enter the path of movement of the swinging support, and it does so when said support is swung rearwardly at the time of filling replenishment. When thereafter the support swings outward to resume its normal position, it. engages and pushes aside the detent 10 the latter pressing against the side of the support and acting thereby to retard or red uceits speed,

so that when it impinges against the stop to there is practicallyno shock, and all danger of rebound is obviated. The detent also acts to hold the support against any rebounding tendency, and there is no opportunity for the thread-parter to loosen its hold prematurely upon the cut piece of thread between the presser p and the jaw h.

The device is simple, inexpensive, and efficient and provides a part not present in my patent referred -to-viz., the friction-detest or retaining device for the swing-support or shuttle-feeler, as it is practically. Any required retrograde movement of the latter is permitted by the inherent resiliency in the stop-arm 10 should the shuttle engage the shuttle-feeler at a time when filling is not to be replenished.

Having fully described my invention, what I claim as new, and desire to secure byLetters 1. In a loom provided with automatic filling-replenishing mechanism, a swinging support, a thread-parter and a thread-holder mounted thereon, to act upon the thread of the filling-supply to be ejected at the time of filling replenishment, and a detent to frictionally engage and gradually reduce the speed of said support as it returns to normal position.

2. In a loom provided with automatic filling-replenishing mechanism, a swinging support, a thread-parter and a thread -holder mounted thereon, to act upon the thread of the filling-supply to be ejected at the time of filling replenishment, and aresilient frictiondetent adapted to engage and retard the speed filling replenishment, and a fixedly-mounted friction-detent to engage the side of and gradually slow down the swinging support as it returns to normal position after replenishv ment.

4. In a loom provided with filling-replenishing mechanism, controlling means there for, a'swinging sh uttle-feeler, means mountedthereon topart and to hold the thread of the filling-supply to be ejected, operation of the controlling means effecting the movement of the shuttle-feeler and the parts carried thereby into operative position, a yielding stop to retain the shuttle-feeler in normal position and permit a limited retrograde movement thereof, and a device to frictionally engage and reduce the speed of the sh uttlc-feeler be fore it meets the stop.

5. In a loom provided with filling-replenishing mechanism, controlling means therefor, a swinging shuttle-feeler, means mounted thereon to part and to hold the thread of the filling-supply to be ejected, operation of the controlling means elfecting the movement of the shuttle-feeler and the parts carried thereby into operative position, and a combined stop and friction-detent for the shuttle-feeler, consisting of a fixedlymounted piece of spring-wire bent to prevent a yielding stop for the said shuttle-feeler, and having its other and elongated arm yieldingly extending partly into the path of and to frictionally engage and reduce the speed of the shuttlefeeler before the latter is brought to rest against the stop.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

EDWARD S. STIMPSON.

Witnesses:

GEORGE OTIS DRAPER, ERNEST W. Wool). 

